Can you find out the missing number in the grid?

If 21x = 79x, what is the value of x?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

I’m tall when I’m young, and I’m short when I’m old. What am I?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

There is so small cabin inside a deep forest.
All the forest burned out to worst possible but the inside of the cabin is still the same.
However all the person inside the cabin die.

How come ?

Mr. Buttons was all set to go to the village of Buttonland to meet his friend. So, he packed his bags and left for the village at 5 in the morning. Upon travelling on a road for miles, he came across a point where the road diverged into two. He was confused on which road to take. He gazed around and he saw two owls sitting on a branch. He thought he could ask for directions for the village from the two owls. So he went to the tree. There he saw a sign which read, "One owl always lies, and one is always truthful. They both fly away if you ask them more than 1 question."
Mr. Buttons was caught in the dilemma of what to ask? And from which owl to ask, since he only had one question. What should Mr. Buttons ask?

Can you find the 09 errors in the picture below?

Today is John's birthday.
A year ago, John had five candles and he lit all the candles except the one at the last.
Now he is going to light all the candles.

How old is John Today?

(He is not five today.....)

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?